<template>
  <!-- 头部部分 -->
  <header class="header">
    <h1>todos</h1>
    <input 
         v-model.trim="name"
         @keyup.enter="add"
         @keyup.esc="name = ''"
     class="new-todo" placeholder="请输入任务名称"  autofocus />
  </header>
</template>

<script>
export default {
  data () {
    return {
      name: "",
    };
  },
  methods: {
      add() {
        if (this.name === "") return alert("内容不能为空");
        this.$emit("add-event",this.name);
        this.name = "";
      },
  },
};
</script>

<style></style>
